Skincare ingredients are the components found in beauty and personal care products that help improve the skin's health and appearance. Common ingredients include hyaluronic acid, which hydrates the skin, and retinol, known for its anti-aging properties. Other popular ingredients are vitamin C, which brightens the skin, and salicylic acid, effective for treating acne. Understanding these ingredients is essential for choosing the right products for your skin type. For example, those with dry skin may benefit from products containing glycerin or ceramides, while oily skin types might prefer niacinamide or witch hazel. Knowing what each ingredient does can help you achieve your skincare goals.